On theory of temporal aberration of dynamic electron optical imaging systems, we have put forward two methods: “τ-variation method" and “direct integral method" to calculate the temporal aberration coefficients. The difference betwe en them is that the “τ-variation method"needs to solve the differential eq uations for geometrical temporal aberration coefficients of second order, while the “direct integral method" needs only to carry out the integral calculations. The aim of the present paper is to test and verify the correctness of the two m ethods using an electrostatic concentric spherical system model. Results show th at these two methods can obtain identical solutions and the solutions of tempora l aberration coefficients of dynamic electron optical imaging systems are the sa me with the analytical solutions. Thus it can be concluded that these two method s are equivalent and correct, but the “direct integral method" is more convenie nt for computation and it could be suggested to use in the practical design.
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